Lenovo 3000 N100 0689 Supplementary Manual page 24

Solving computer problems
Problem:
The "critical low-battery error" message appears, and the computer
immediately turns off.
Solution:
Problem:
When you press Fn to return from standby mode, the computer display
remains blank.
Solution:
Note: If you are using the Fn+F7 key combination to apply a presentation
Problem:
The computer does not return from standby mode, or the power and
standby indicators stays on and the computer does not work.
Solution:
16
Lenovo 3000 N100 Service and Troubleshooting Guide
– The operating temperature is within the acceptable range. Refer to
"Specifications" on page 50.
If the battery is charged and the temperature is within range, have the
computer serviced.
→ The battery power is getting low. Connect the ac adapter to the
computer, or replace the battery with a fully charged one.
→ Check whether an external monitor was disconnected while the
computer was in standby mode. Do not disconnect the external
monitor while the computer is in standby mode or hibernation mode. If
no external monitor is attached when the computer resumes, the
computer display remains blank and output is not displayed. This
restriction does not depend on the resolution value. Press Fn+F7 to
bring up the computer display.
scheme, you will need to press Fn+F7 at least three times in three
seconds to bring up the computer display.
→ If the system does not return from standby mode, it may have
entered standby or hibernation mode automatically because the battery
is depleted. Check the standby indicator.
– If the standby indicator is on, your computer is in standby mode.
Connect the ac adapter to the computer; then press Fn.
– If the standby indicator is off, your computer is in hibernation mode
or power-off state. Connect the ac adapter to the computer; then
press power button to resume operation.